HP 6120XG HP ProCurve Series 6120 Blade Switches Access Security Guide - Page 454
Editing a Source-Port Filter
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Traffic/Security Filters and Monitors Configuring Traffic/Security Filters filter on port 5, then create a trunk with ports 5 and 6, and display the results, you would see the following: The *5* shows that port 5 is configured for filtering, but the filtering action has been suspended while the port is a member of a trunk. If you want the trunk to which port 5 belongs to filter traffic, then you must explicitly configure filtering on the trunk. Note: If you configure an existing trunk for filtering and later add another port to the trunk, the switch will apply the filter to all traffic moving on any link in the trunk. If you remove a port from the trunk it returns to the configuration it had before it was added to the trunk Figure 11-13. Example of Switch Response to Adding a Filtered Source Port to a Trunk Editing a Source-Port Filter The switch includes in one filter the action(s) for all destination ports and/or trunks configured for a given source port or trunk. Thus, if a source-port filter already exists and you want to change the currently configured action for some destination ports or trunks, use the filter source-port command to update the existing filter. For example, suppose you configure a filter to drop traffic received on port 8 and destined for ports 1 and 2. The resulting filter is shown on the left in figure 11-14. Later, you update the filter to drop traffic received on port 8 and destined for ports 3 through 5. Since only one filter exists for a given source port, the filter on traffic from port 8 appears as shown on the right in figure 11-14: 11-18
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